Improvement in grate-bars



PATENT OFFICE.

LORENZO B. TUPPER, OF NE\V YORK, N. Y.

IMPROVEMENT IN GRATE-BARS.

Specification forming part of Letters Patent No. 43.14`3, dated4 June 14, 1864.

To @ZZ whom it may concern.-

Be it known that I, LORENZO B. TUPPER, of the city and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Grate-Bars for Furnaces; and I do hereby declare the following to be a full, clear, and exact description ot' my said invention, reference being had to the annexed drawings, making part of this specification, wherein- Figure 1 is a plan ot' said gratebars, and Fig. 2 is a side elevation of the same.

Similar marks of reference denote the same parts.

In Letters Patent granted to Daniel Lashar, September 11, 1860, a grate-bar is shown in which a series of alternately-connected parallelograms are formed on opposite sides of a cross-bar or support. In practical use it is found that these are liable to be knocked on", when in a heated state, by the. scraper employed in cleaning the ire of ashes, or by the lumps of coal thrown into the furnace.

My invention is an improvement on the aforesaid patent; and it consists in connecting three or four of such parallelograms together, sothat they sustain each other, and are not liable to be broken od', at the same time the benetits and advantages arising from the construction of the aforesaid bar are not interfered with, the air is admitted freely, the

scraper is sustained by and slides easily over the grate, the bar is light and strong, and the cinders and ashes fall through or are broken up against the surface of Vsuch grate by the Scraper.

In the drawings, a is the center bar or support. I) b are cross-bars or projections from opposite sides of the har a, which are united at their ends, three, four, or five in sections, by the portions c, so that they are sufficiently strong and not likely to be broken off in use.

At 1 I have shown the portion c as uniting the ends of three ot' these cross-bars b; at 2 there are four similarly united, and at 3 there are ve of such cross-bars b united by the bar c. rIhe number of such bars that are united by the portion c may vary in different parts of the furnace or of the same bar, according tothe. amount of air which is required and the Wear to which the bars are subjected.

The portions c of my gratebar render the whole bar so much stronger that the sustaining-lu gs t' t' are not :required as close together as in the said Lashar patent; hence greater facility is afforded for raking the fire from below.

What I claim, and desire to secure by Letters Patent, is

Connecting the ends of three, four, orfive of the cross-bars or pieces b to each other, as at c, for the purposes and as specified.

In witness whereof I have hereunto set my signature this 21st day of March, 186i.

L. B. TUPPER.

Witnesses LEMUEL W. SERRELL, THos. GEO. HAROLD. 

